Valve

The hint to the solution is to decipher the unseen mechanism of the maze by rotating each of the six corners and inside pieces.
Designed by Finnish designer Vesa Timonen.

Hanayama started in the mid-1930s as a manufacturer and retailer of traditional games, indoor pursuits, and other toys, and from the very beginning has placed a great emphasis on creative ideas and good quality. More than eighty years later, Hanayama continues to make cast puzzles that are guaranteed to be fun and interesting amusements for people of all ages.